核主泵电动机屏蔽套磁-热联合仿真  

Simulation on magnetic-thermal coupling of shielding sleeve for nuclear reactor coolant pump motor

作　　者：刘奕新 焦峰 张志军[1] 袁寿其[2] 朱荣生[2] 龙云[2] LIU Yixin;JIAO Feng;ZHANG Zhijun;YUAN Shouqi;ZHU Rongsheng;LONG Yun(School of Mechanical Engineering and Automation,Northeastern University,Shenyang,Liaoning 110819,China;National Research Center of Pumps,Jiangsu University,Zhenjiang,Jiangsu 212013,China)

机构地区：[1]东北大学机械工程与自动化学院,辽宁沈阳110819 [2]江苏大学国家水泵及系统工程技术研究中心,江苏镇江212013

出　　处：《排灌机械工程学报》2024年第12期1196-1202,共7页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学联合基金重点资助项目(U20A20292);中国博士后科学基金面上资助项目(2023M733355)。

摘　　要：为探究核主泵屏蔽电动机屏蔽套材料及厚度对涡流损耗的影响,以某功率为5.5 MW的AP1000屏蔽感应电动机为研究对象,应用低频电磁仿真软件Maxwell建立二维电磁仿真模型,对比3种材料(Hastelloy-C,Inconel,SUS316L)在不同尺寸下的屏蔽套涡流损耗.基于电磁仿真结果,运用磁-热联合方法,将涡流损耗值作为热源输入到核主泵电动机屏蔽套冷却模型中,通过ANSYS Fluent软件进行温度场和流场仿真.结果表明:相同屏蔽套尺寸下,材料Hastelloy-C的涡流损耗最小;相同材料下,屏蔽套厚度越小,涡流损耗越低;屏蔽套间隙流冷却系统入口到屏蔽套间隙温度变化剧烈,定子屏蔽套温度整体高于转子屏蔽套温度,两者温差约为20℃;屏蔽套上的压力分布不均匀,且沿轴向来流方向压力逐渐降低,降幅约为16.0 kPa.研究结果可为核主泵电动机屏蔽套的材料及厚度选择提供一定参考.In order to investigate the influence of shielding sleeve material and thickness on eddy current loss of shielding sleeve of nuclear reactor coolant pump motor,a 5.5 MW AP1000 nuclear reactor coolant pump(RCP)shielded induction motor was taken as the research object,and a two-dimensional electromagnetic model was developed using the low-frequency Maxwell simulation software to evaluate the eddy current loss across varying thicknesses of shielding sleeves composed of three materials:Hastelloy-C,Inconel,and SUS316L.Based on the electromagnetic simulation results,the magnetic-thermal coupling framework was used to input the calculated eddy current loss value as the heat source into the cooling model of the nuclear reactor coolant pump motor shield sleeve,and the temperature and fluid flow fields were simulated using ANSYS Fluent software.The analysis reveals that Hastelloy-C exhibits the lowest eddy current losses for shielding sleeves of identical dimensions.For the same material,thinner sleeves reduce these losses.The temperature gradient from the inlet of the shielding sleeve gap flow cooling system to the shielding sleeve gap changes dramatically,with the stator shielding sleeve consistently registering a higher temperature than the rotor shielding sleeve tempe-rature,resulting in a differential of approximately 20°C.The pressure distribution on the shielding sleeve is uneven,and the pressure gradually decreases along the axial flow direction,showing a decrease of around 16.0 kPa.These research findings can provide critical insights for optimizing material selection and thickness design of shielding sleeves in nuclear RCP motors.

关 键 词：核主泵电动机 屏蔽套 涡流损耗 磁-热联合仿真 

分 类 号：S220.39[农业科学—农业机械化工程]